| | Some definitions of interest. |
|
| int_seg | Def {i..j } == {k: | i k < j } |
| | | Thm* m,n: . {m..n } Type |
|
| nat | Def == {i: | 0 i } |
| | | Thm* Type |
|
| not | Def A == A  False |
| | | Thm* A:Prop. ( A) Prop |
|
| upto | Def upto(i;j) == if i < j [i / upto(i+1;j)] else nil fi (recursive) |
| | | Thm* i,j: . upto(i;j) {i..j } List |